107521521 has 4 divisors (see below), whose sum is σ = 143362032. Its totient is φ = 71681012.

The previous prime is 107521517. The next prime is 107521537. The reversal of 107521521 is 125125701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 107521521 - 2² = 107521517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 107521491 and 107521500.

It is not an unprimeable number, because it can be changed into a prime (107521621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17920251 + ... + 17920256.

It is an arithmetic number, because the mean of its divisors is an integer number (35840508).

Almost surely, 2^107521521 is an apocalyptic number.

It is an amenable number.

107521521 is a deficient number, since it is larger than the sum of its proper divisors (35840511).

107521521 is an equidigital number, since it uses as much as digits as its factorization.

107521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35840510.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 107521521 is about 10369.2584595042. The cubic root of 107521521 is about 475.5159984489.

The spelling of 107521521 in words is "one hundred seven million, five hundred twenty-one thousand, five hundred twenty-one".